16155321165 has 24 divisors (see below), whose sum is σ = 28035072000. Its totient is φ = 8606166624.

The previous prime is 16155321163. The next prime is 16155321167. The reversal of 16155321165 is 56112355161.

16155321165 is a `hidden beast` number, since 1 + 6 + 1 + 5 + 532 + 116 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (16155321163) and next prime (16155321167).

It is not a de Polignac number, because 16155321165 - 2¹ = 16155321163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16155321163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 169165 + ... + 246834.

It is an arithmetic number, because the mean of its divisors is an integer number (1168128000).

Almost surely, 2^16155321165 is an apocalyptic number.

16155321165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16155321165 is a deficient number, since it is larger than the sum of its proper divisors (11879750835).

16155321165 is a wasteful number, since it uses less digits than its factorization.

16155321165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416873 (or 416870 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The spelling of 16155321165 in words is "sixteen billion, one hundred fifty-five million, three hundred twenty-one thousand, one hundred sixty-five".